Enter the length of the quilt top, the width of the quilt top, and the number of borders into the calculator to determine the total length of fabric needed for the quilt border.

Quilt Border Formula

The following formula is used to calculate the total length of fabric needed for a quilt border:

LB = (2 * L + 2 * W) * N

Variables:

  • LB is the total length of fabric needed for the quilt border
  • L is the length of the quilt top
  • W is the width of the quilt top
  • N is the number of borders

To calculate the total length of fabric needed for the quilt border, multiply the sum of twice the length of the quilt top and twice the width of the quilt top by the number of borders.

What is a Quilt Border?

A quilt border is a strip or strips of fabric that frame the edges of a quilt. They serve both a functional and aesthetic purpose. Functionally, they help to protect the edges of the quilt, provide a firm structure for binding, and can add size to the quilt if needed. Aesthetically, they offer an opportunity to add visual interest, enhance the quilt’s design, or introduce new colors or patterns. Borders can be a single strip of fabric, multiple strips, or pieced blocks. They can be the same on all sides, or vary in width or design from one side to another. The choice of border can significantly impact the overall look of the quilt, making it an important element in quilt design.

How to Calculate Quilt Border?

The following steps outline how to calculate the Quilt Border.


  1. First, determine the length of the quilt border (in inches).
  2. Next, determine the width of the quilt border (in inches).
  3. Next, gather the formula from above = Quilt Border = 2 * (Length + Width).
  4. Finally, calculate the Quilt Border.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Length of the quilt border (in inches) = 60

Width of the quilt border (in inches) = 10